#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
char* my_strcat(char* destination, const  char* source)
{
	char* tem = destination;
	while (*destination!='\0')
	{
		destination++;
	}
	while (*destination++=*source++)
	{
		;
	}
	return tem;
}
int main()
{
	char a[100] = "asd";
	my_strcat(a, "asd");
	
	return 0;

}